CN105634859B - LBT channel detection method and system, base station and terminal based on load - Google Patents
LBT channel detection method and system, base station and terminal based on load Download PDFInfo
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- CN105634859B CN105634859B CN201510466628.5A CN201510466628A CN105634859B CN 105634859 B CN105634859 B CN 105634859B CN 201510466628 A CN201510466628 A CN 201510466628A CN 105634859 B CN105634859 B CN 105634859B
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Abstract
The LBT channel detection method that the invention proposes a kind of based on load, a kind of LBT Channel Detection system, a kind of base station and a kind of terminal based on load, wherein, the LBT channel detection method based on load includes: to configure M delay time after the initial CCA Channel Detection Time or the current ECCA detection granularity when detecting channel busy in the current ECCA of the initial CCA Channel Detection Time of the LBT Channel Detection based on load or ECCA Channel Detection Time detection granularity；Continue the LBT Channel Detection based on load by granularity of delay time within the M delay time, wherein M is the integer more than or equal to 1.According to the technical solution of the present invention, the accurate definition to delay time (defer period) may be implemented, so as to configure different delay times for different sending objects, different channel occupancy probabilities are realized, to improve the efficiency of Channel Detection.
Description
Technical field
The present invention relates to fields of communication technology, in particular to a kind of LBT channel detection method based on load, one
LBT Channel Detection system, a kind of base station and a kind of terminal of the kind based on load.
Background technique
With the sharp increase of message volume, 3GPP (The 3rdGeneration Partnership Project,
3G (Third Generation) Moblie partnership) authorization frequency spectrum it is less and less adequate to provide higher network capacity.In order to further mention
The utilization rate of high frequency spectrum resource, 3GPP just discussing how with the help of authorizing frequency spectrum using unlicensed spectrum, such as 2.4GHz and
5GHz frequency range.These unlicensed spectrums are presently mainly that the systems such as Wi-Fi, bluetooth, radar, medical treatment are using.
Under normal conditions, be the access technology of the design of authorized spectrum band, as LTE (Long Term Evolution, for a long time
Evolution) be not suitable for using in unauthorized frequency range, because this kind of access technology of LTE wants spectrum efficiency and user experience optimization
Ask very high.However, carrier wave polymerization (Carrier Aggregation, CA) function allows and LTE is deployed in unauthorized frequency range becomes
It may.3GPP proposes the concept of LAA (access of LTE Assisted Access, LTE auxiliary), by the side of LTE authorization frequency spectrum
It helps using unlicensed spectrum.And unlicensed spectrum can there are two types of working method, one is supplement downlink (SDL,
Supplemental Downlink), i.e. only downlink transfer subframe；Another kind is tdd mode, both includes downlink subframe, uplink
Subframe.Supplementing downlink such case can only use by carrier aggregation technology.And tdd mode by carrier wave in addition to that can polymerize
Technology can also be used by DC (Dual Connectivity, doubly-linked are logical), can also independently be used outside.Such as Fig. 1 institute
Show.
Compared to Wi-Fi system, the LTE system in unauthorized frequency range that works has the ability to provide higher spectrum efficiency and more
Big coverage effect, while allowing data traffic between authorized spectrum band and unauthorized frequency range without seaming and cutting based on the same core net
It changes.For users, it means that better broadband experience, higher rate, better stability and mobile convenience.
The existing access technology used in unlicensed spectrum, such as Wi-Fi have weaker anti-interference ability.In order to
It avoids interfering, Wi-Fi system devises many interference and avoids rule, such as CSMA/CD (Carrier Sense Multiple
Access/Collision Detection, csma/collision detection method), the basic principle of this method
It is that either terminal wants first Monitor detection week before sending signaling or data by the AP (Access Point, access point) of Wi-Fi
Whether have other APs or other terminals in transmission/reception signaling or data, if so, then continuing to monitor, until listening to not if enclosing
Until having；If no, generating a random number as back off time, in this back off time, if not detected letter
It enables or data is transmitted, then AP or terminal can start to send signaling or data after back off time terminates.The process is as schemed
Shown in 2.
But due to there is good orthogonality to ensure that interference level in LTE network, so the uplink and downlink of base station and user
Transmission does not have to consider whether surrounding has other base stations or other users in transmission data.If LTE is used in unauthorized frequency range
When do not consider yet around whether have other equipment use unauthorized frequency range, then great interference will be brought to Wi-Fi equipment.
Because LTE is transmitted as long as having business, without any monitoring rule, then Wi-Fi equipment when LTE has business transmission just
It cannot transmit, can only be transmitted until LTE business, can just detect channel clear to carry out data transmission.
So LTE is when using unauthorized frequency range, one of most important key point is to ensure that LAA (LTE assisted
The access technology of access, LTE auxiliary) it can be total on the basis of fair friendly with existing access technology (such as Wi-Fi)
It deposits.And there is no the mechanism of LBT (Listen Before Talk, listem-before-talk) in traditional LTE system to avoid collision.In order to
It is preferably coexisted with Wi-Fi, LTE needs a kind of LBT mechanism.In this way, LTE in unlicensed spectrum if detecting channel busy,
The frequency range cannot be then occupied, if detecting the channel spare time, could be occupied.
Based on the above issues, currently, proposing a kind of (FBE, Frame based equipment's) based on frame structure
LBT mechanism (as shown in Figure 3), left oblique line are the channel inspections of CCA (Clear Channel Assessment, clear channel assessment (CCA))
The time is surveyed, CCA detection time is repeated cyclically appearance, if detecting channel idle, busy channel is reached in Channel holding time
To after maximum channel holding time, there is idle (free time) time, in the idle time, sending point does not send signal sum number
According in order to which channel is seized in other sending points.After the idle time, and there is CCA detection time, if detecting channel busy,
It is then not take up channel, detects channel again when the CCA detection time in next period occurs.Certainly, Channel Detection Time
Belong to the idle time, idle duration has to be larger than the 5% of channel maximum holding time.When the idle time adds channel occupancy maximum
Between i.e. the period.
At present, it is also proposed that a kind of LBT mechanism of (LBE, Load based equipment) based on load, such as Fig. 4
Shown: the LBT mechanism based on LBE is no periodic, as long as business reaches, triggers CCA detection, if CCA detection is idle,
Signaling or data are sent at once；If detecting channel busy, a random number N is taken, the value range of N arrives q (i.e. contention window for 1
Mouth length), the value range of q is 4 to 32.Fig. 4 shows the case where q=16, at this point, when detecting channel idle, channel
Maximum holding time is (13/32) × q=6.5ms.After 6.5ms, extended CCA (ECCA, extended channel are taken
Detection time) mechanism, i.e., and the range of random value N, N are 1 to 16, if value is 8, then it represents that next continuous
In CCA detection time, each CCA detection time will detect channel, if detecting channel idle, N-1, if detecting channel
Busy, then N is constant, when N is 0, sends signaling or data.
In addition, in order to further keep fairness with Wi-Fi, LBE takes different initial CCA (initial channels
Detection time) and extended CCA (ECCA, extended Channel Detection Time) value, such as first time CCA detection, cry
Initial CCA, this time granularity is bigger, such as 34us；When detecting that channel busy or Channel holding time end it
The time granularity of ECCA afterwards is smaller, such as 9us.In addition, if detecting channel busy, to increase by one in Channel Detection
A defer period (delay time), the value of the defer period are suitable with the value of initial CCA, that is to say, that necessary
It detects channel idle for a long time again, N-1 could be continued.
Moreover, producing collision (for example receiving more NACK feedback) when if sending, next time carries out the inspection of LBT channel
Competition window q value when survey just needs to increase.
Problem is that the definition of the delay time in LAA system (defer period) is also indefinite at present.
Therefore, how to realize becomes urgent problem to be solved to the accurate definition of delay time (defer period).
Summary of the invention
The present invention is based on the above problems, proposes a kind of new technical solution, may be implemented to delay time
The accurate definition of (defer period) is realized not so as to configure different delay times for different sending objects
Same channel occupancy probabilities, to improve the efficiency of Channel Detection.
In view of this, first aspect of the present invention it is proposed a kind of LBT channel detection method based on load, comprising: when
The LBT Channel Detection based on load initial CCA Channel Detection Time or ECCA Channel Detection Time it is current
When detecting channel busy in ECCA detection granularity, in the initial CCA Channel Detection Time or the current ECCA detection
M delay time is configured after granularity；Continue within the M delay time using delay time as granularity described based on negative
The LBT Channel Detection of load, wherein M is the integer more than or equal to 1.
In the technical scheme, when carrying out the LBT mechanism based on LBE, by the LBT Channel Detection based on load
When detecting channel busy in the current ECCA of initial CCA Channel Detection Time or ECCA Channel Detection Time detection granularity,
It, then can be when detecting channel busy in a certain granularity of first time CCA (initial CCA) detection or ECCA detection
M delay time is configured after the initial CCA Channel Detection Time or current ECCA detection granularity, for continuing to prolong
The slow time is that granularity carries out the LBT Channel Detection based on load, wherein M is the integer more than or equal to 1, and the specific value of M
Depending on as the case may be, to realize the accurate definition to delay time (defer period).
In the above-mentioned technical solutions, it is preferable that the M delay time is sequentially adjacent and per two adjacent delay times
Between there is no overlapping part, to form for the first type delay time；Or it is adjacent two every in the M delay time
There is the part of overlapping between delay time, to form second type delay time.
In the technical scheme, the definition to delay time type is realized, specifically, if M delay time sequentially phase
There is no the part of overlapping (i.e. delay time is fixed) between adjacent and every two adjacent delay times, then prolong for the first type
The slow time, and when (i.e. delay time is for the part that there is overlapping between every two adjacent delay times in M delay time
Sliding), then it is second type delay time, in this way, the definition of delay time has been refined, to make the definition of delay time more
Clearly, it is illustrated, and can satisfy to delay time to diversified demand.
In the above-mentioned technical solutions, it is preferable that the second type delay time it is non-heavy in addition to the part of the overlapping
Folded part granularmetric composition is detected by the ECCA of preset quantity, wherein the preset quantity is greater than or equal to 1 and is less than
The sum of ECCA detection granularity in each delay time.
In the technical scheme, when the portion that there is overlapping between every two adjacent delay times in M delay time
Granularity is detected by the ECCA of preset quantity in timesharing, the part for configuring the non-overlap in addition to the part of overlapping of second type delay time
Composition, wherein preset quantity be greater than or equal to 1 and be less than each delay time in ECCA detection granularity sum (if
Each delay time be not ECCA detection granularity integral multiple, then for less than in each delay time ECCA detect granularity to
The number of upper rounding), i.e., every adjacent two at least one ECCA of delay times detection granularity is underlapped but at least there is weight
Folded part, and the integral multiple that the part of the overlapping can be ECCA detection granularity may not be (if each delay time
It is the integral multiple of ECCA detection granularity, then the part being overlapped is also the integral multiple of ECCA detection granularity；Otherwise, it is not), according to tool
Body situation configuration, to realize looser Channel Detection.
In the above-mentioned technical solutions, it is preferable that each delay time in the M delay time is ECCA detection grain
The integral multiple for being greater than or equal to 2 of degree.
In the technical scheme, each delay time in M delay time includes at least the integer more than or equal to 2
The ECCA of the LBT mechanism based on LBE detect granularity, with whether detection channel idle for a long time again, and define delay
The relationship of time and ECCA detection granularity, and when each delay time is the whole more than or equal to 2 of ECCA detection granularity
When several times, the part of the overlapping of second type delay time and the part of non-overlap can detect granularity group by the ECCA of integer
At to realize the further definition to delay time.
In the above-mentioned technical solutions, it is preferable that when configuring the M delay according to the channel occupancy priority of sending object
Between component type, wherein configure the first type delay time for channel occupancy priority sending object rearward, with
And the second type delay time is configured for the forward sending object of the channel occupancy priority.
In the technical scheme, by being configured according to the channel occupancy priority (i.e. different sending objects) of sending object
The component type of M delay time, specifically, if the priority of sending object busy channel is rearward, configurable first type prolongs
The slow time, if the priority of sending object busy channel is forward, configuration is more easily detected the second type delay of channel idle
Time, for example, for downlink PDCCH (Physical Downlink Control Channel Physical Downlink Control Channel)/
EPDCCH (Enhanced Physical Downlink Control Channel enhances Physical Downlink Control Channel) sends UL
Grant (uplink authorization) or PUSCH (the shared letter of Physical Uplink Shared Channel physical uplink for sending uplink
Road) priority be higher than send downlink PDSCH (Physical Downlink Shared Channel Physical Downlink Shared Channel),
It is higher than transmission downlink PDSCH for sending downlink discovery reference signal priority, UL grant scheduling is sent by unlicensed spectrum
PUSCH priority be higher than and be authorized to the PUSCH that frequency spectrum sends UL grant scheduling, the PDSCH (or PUSCH) of delay sensitive is excellent
First grade is higher than the insensitive PDSCH (or PUSCH) of time delay, combines for above a variety of comparison others, compared with the latter, Qian Zhexi
Prestige, which is easier to rob, accounts for channel, so the former configures second type delay time, and the latter should then configure for the first type delay time, with
It realizes different channel occupancy probabilities, and improves the efficiency of Channel Detection, and then improve channel occupancy probabilities.
In the above-mentioned technical solutions, it is preferable that persistently detected when within any delay time in the M delay time
When to channel idle, then stop at after any delay time carry out it is described using delay time as the Channel Detection of granularity,
And continue Channel Detection by ECCA detection granularity.
In the technical scheme, if being continuously detected channel idle in any delay time in M delay time,
Can stop at after any delay time and carry out using delay time as the Channel Detection of granularity, and restore by ECCA detection granularity after
It is continuous to carry out Channel Detection, carry out what when Channel Detection stopped by granularity of delay time through the above technical solutions, having determined
Definition, while the foundation of the specific value of determining M is provided, to keep the definition of delay time more perfect.
In the above-mentioned technical solutions, it is preferable that further include: record the initial CCA Channel Detection Time or described
The current value of ECCA random number N at the end of current ECCA detection granularity；And described in working as in the M delay time
When being continuously detected channel idle in any delay time, control keeps the current value of the ECCA random number N constant.
In the technical scheme, it is specified that in delay time operation whether successively decreasing of random number N value is specifically led to
The current value of ECCA random number N at the end of overwriting initial CCA Channel Detection Time or current ECCA detection granularity,
And if when being continuously detected channel idle in any delay time within M delay time, controlling and keeping ECCA random
The current value of number N is constant, i.e., the operation that the current value of ECCA random number N is not successively decreased is carried out within delay time.
The second aspect of the present invention proposes a kind of LBT Channel Detection system based on load, comprising: configuration module is used
In when the initial CCA Channel Detection Time or ECCA Channel Detection Time in the LBT Channel Detection based on load
When detecting channel busy in current ECCA detection granularity, in the initial CCA Channel Detection Time or the current ECCA
It detects granularity and configures M delay time later；Control module is used within the M delay time using delay time as granularity
Continue the LBT Channel Detection based on load, wherein M is the integer more than or equal to 1.
In the technical scheme, when carrying out the LBT mechanism based on LBE, by the LBT Channel Detection based on load
When detecting channel busy in the current ECCA of initial CCA Channel Detection Time or ECCA Channel Detection Time detection granularity,
It, then can be when detecting channel busy in a certain granularity of first time CCA (initial CCA) detection or ECCA detection
M delay time is configured after the initial CCA Channel Detection Time or current ECCA detection granularity, for continuing to prolong
The slow time is that granularity carries out the LBT Channel Detection based on load, wherein M is the integer more than or equal to 1, and the specific value of M
Depending on as the case may be, to realize the accurate definition to delay time (defer period).
In the above-mentioned technical solutions, it is preferable that the configuration module is specifically used for: the M delay time is sequentially adjacent
And there is no the parts of overlapping between every two adjacent delay times, to form for the first type delay time；Or the M prolongs
There is the part of overlapping between every two adjacent delay times in the slow time, to form second type delay time.
In the technical scheme, the definition to delay time type is realized, specifically, if M delay time sequentially phase
There is no the part of overlapping (i.e. delay time is fixed) between adjacent and every two adjacent delay times, then prolong for the first type
The slow time, and when (i.e. delay time is for the part that there is overlapping between every two adjacent delay times in M delay time
Sliding), then it is second type delay time, in this way, the definition of delay time has been refined, to make the definition of delay time more
Clearly, it is illustrated, and can satisfy to delay time to diversified demand.
In the above-mentioned technical solutions, it is preferable that the configuration module is specifically also used to: configuring the second type delay time
The non-overlap in addition to the part of the overlapping part by preset quantity the ECCA detect granularmetric composition, wherein it is described
Preset quantity is greater than or equal to 1 and less than the sum of the ECCA detection granularity in each delay time.
In the technical scheme, when the portion that there is overlapping between every two adjacent delay times in M delay time
Granularity is detected by the ECCA of preset quantity in timesharing, the part for configuring the non-overlap in addition to the part of overlapping of second type delay time
Composition, wherein preset quantity be greater than or equal to 1 and be less than each delay time in ECCA detection granularity sum (if
Each delay time be not ECCA detection granularity integral multiple, then for less than in each delay time ECCA detect granularity to
The number of upper rounding), i.e., every adjacent two at least one ECCA of delay times detection granularity is underlapped but at least there is weight
Folded part, and the part of the overlapping can be may not be with the integral multiple that ECCA detects granularity (if each delay time is
ECCA detects the integral multiple of granularity, then the part being overlapped is also the integral multiple of ECCA detection granularity；Otherwise, it is not), according to specific
Situation configuration, to realize looser Channel Detection.
In the above-mentioned technical solutions, it is preferable that the configuration module is specifically also used to: configuring in the M delay time
Each delay time be ECCA detection granularity be greater than or equal to 2 integral multiple.
In the technical scheme, each delay time in M delay time includes at least the integer more than or equal to 2
The ECCA of the LBT mechanism based on LBE detect granularity, with whether detection channel idle for a long time again, and define delay
The relationship of time and ECCA detection granularity, and when each delay time is the whole more than or equal to 2 of ECCA detection granularity
When several times, the part of the overlapping of second type delay time and the part of non-overlap can detect granularity group by the ECCA of integer
At to realize the further definition to delay time.
In the above-mentioned technical solutions, it is preferable that the configuration module is specifically also used to: according to the channel occupancy of sending object
Priority configures the component type of the M delay time, wherein matches for the sending object of the channel occupancy priority rearward
It sets the first type delay time, and configures the second type delay for the forward sending object of the channel occupancy priority
Time.
In the technical scheme, by being configured according to the channel occupancy priority (i.e. different sending objects) of sending object
The component type of M delay time, specifically, if the priority of sending object busy channel is rearward, configurable first type prolongs
The slow time, if the priority of sending object busy channel is forward, configuration is more easily detected the second type delay of channel idle
Time, for example, for downlink PDCCH (Physical Downlink Control Channel Physical Downlink Control Channel)/
EPDCCH (Enhanced Physical Downlink Control Channel enhances Physical Downlink Control Channel) sends UL
Grant (uplink authorization) or PUSCH (the shared letter of Physical Uplink Shared Channel physical uplink for sending uplink
Road) priority be higher than send downlink PDSCH (Physical Downlink Shared Channel Physical Downlink Shared Channel),
It is higher than transmission downlink PDSCH for sending downlink discovery reference signal priority, UL grant scheduling is sent by unlicensed spectrum
PUSCH priority be higher than and be authorized to the PUSCH that frequency spectrum sends UL grant scheduling, the PDSCH (or PUSCH) of delay sensitive is excellent
First grade is higher than the insensitive PDSCH (or PUSCH) of time delay, combines for above a variety of comparison others, compared with the latter, Qian Zhexi
Prestige, which is easier to rob, accounts for channel, so the former configures second type delay time, and the latter should then configure for the first type delay time, with
It realizes different channel occupancy probabilities, and improves the efficiency of Channel Detection, and then improve channel occupancy probabilities.
In the above-mentioned technical solutions, it is preferable that the control module is specifically used for: when in the M delay time
When being continuously detected channel idle in any delay time, then progress is described with delay after stopping at any delay time
Time is the Channel Detection of granularity, and continues Channel Detection by ECCA detection granularity.
In the technical scheme, if being continuously detected channel idle in any delay time in M delay time,
Can stop at after any delay time and carry out using delay time as the Channel Detection of granularity, and restore by ECCA detection granularity after
It is continuous to carry out Channel Detection, carry out what when Channel Detection stopped by granularity of delay time through the above technical solutions, having determined
Definition, while the foundation of the specific value of determining M is given, to keep the definition of delay time more perfect.
In the above-mentioned technical solutions, it is preferable that further include: logging modle, for recording the initial CCA channel inspection
The current value of ECCA random number N at the end of survey time or the current ECCA detection granularity；And the control module is also
For: when being continuously detected channel idle in any delay time in the M delay time, control keeps institute
The current value for stating ECCA random number N is constant.
In the technical scheme, it is specified that in delay time operation whether successively decreasing of random number N value is specifically led to
The current value of ECCA random number N at the end of overwriting initial CCA Channel Detection Time or current ECCA detection granularity,
And if when being continuously detected channel idle in any delay time within M delay time, controlling and keeping ECCA random
The current value of number N is constant, i.e., the operation that the current value of ECCA random number N is not successively decreased is carried out within delay time.
The third aspect of the present invention proposes a kind of base station, comprising: as described in any one of above-mentioned second aspect based on
The LBT Channel Detection system of load, therefore, the base station have and any one of second aspect described in the LBT letter based on load
The identical technical effect of road detection system, details are not described herein.
The fourth aspect of the present invention proposes a kind of terminal, comprising: as described in any one of above-mentioned second aspect based on
The LBT Channel Detection system of load, therefore, the terminal have and any one of second aspect described in the LBT letter based on load
The identical technical effect of road detection system, details are not described herein.
According to the technical solution of the present invention, the accurate definition to delay time (defer period) may be implemented, thus
Different delay times can be configured for different sending objects, realize different channel occupancy probabilities, to improve channel inspection
The efficiency of survey.
Detailed description of the invention
Fig. 1 shows the schematic diagram of two kinds of working methods of unlicensed spectrum；
Fig. 2 shows the schematic diagrames that the interference of Wi-Fi system avoids rule；
Fig. 3 shows the structural schematic diagram of the frame structure based on FBE in the related technology；
Fig. 4 shows the structural schematic diagram of the frame structure based on LBE in the related technology；
Fig. 5 shows the process signal of the LBT channel detection method according to an embodiment of the invention based on load
Figure；
Fig. 6 shows the block diagram of the LBT Channel Detection system according to an embodiment of the invention based on load；
Fig. 7 shows the block diagram of base station according to an embodiment of the invention；
Fig. 8 shows the block diagram of terminal according to an embodiment of the invention；
Fig. 9 shows the schematic diagram of the first type defer period according to an embodiment of the invention；
Figure 10 shows the schematic diagram of second type defer period according to an embodiment of the invention；
Figure 11 shows the random number N value according to an embodiment of the invention in the first type defer period and does not pass
The schematic diagram subtracted；
Figure 12 shows the random number N value according to an embodiment of the invention in second type defer period and does not pass
The schematic diagram subtracted.
Specific embodiment
It is with reference to the accompanying drawing and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Fig. 5 shows the process signal of the LBT channel detection method according to an embodiment of the invention based on load
Figure.
As shown in figure 5, the LBT channel detection method according to an embodiment of the invention based on load, comprising: step
502, when the initial CCA Channel Detection Time or ECCA Channel Detection Time in the LBT Channel Detection based on load
Current ECCA detection granularity in when detecting channel busy, in the initial CCA Channel Detection Time or described current
ECCA configures M delay time after detecting granularity；Step 504, within the M delay time using delay time as granularity after
It is continuous to carry out the LBT Channel Detection based on load, wherein M is the integer more than or equal to 1.
In the technical scheme, when carrying out the LBT mechanism based on LBE, by the LBT Channel Detection based on load
When detecting channel busy in the current ECCA of initial CCA Channel Detection Time or ECCA Channel Detection Time detection granularity,
It, then can be when detecting channel busy in a certain granularity of first time CCA (initial CCA) detection or ECCA detection
M delay time is configured after the initial CCA Channel Detection Time or current ECCA detection granularity, for continuing to prolong
The slow time is that granularity carries out the LBT Channel Detection based on load, wherein M is the integer more than or equal to 1, and the specific value of M
Depending on as the case may be, to realize the accurate definition to delay time (defer period).
In the above-mentioned technical solutions, it is preferable that the M delay time is sequentially adjacent and per two adjacent delay times
Between there is no overlapping part, to form for the first type delay time；Or it is adjacent two every in the M delay time
There is the part of overlapping between delay time, to form second type delay time.
In the technical scheme, the definition to delay time type is realized, specifically, if M delay time sequentially phase
There is no the part of overlapping (i.e. delay time is fixed) between adjacent and every two adjacent delay times, then prolong for the first type
The slow time, and when (i.e. delay time is for the part that there is overlapping between every two adjacent delay times in M delay time
Sliding), then it is second type delay time, in this way, the definition of delay time has been refined, to make the definition of delay time more
Clearly, it is illustrated, and can satisfy to delay time to diversified demand.
In the above-mentioned technical solutions, it is preferable that the second type delay time it is non-heavy in addition to the part of the overlapping
Folded part granularmetric composition is detected by the ECCA of preset quantity, wherein the preset quantity is greater than or equal to 1 and is less than
The sum of ECCA detection granularity in each delay time.
In the technical scheme, when the portion that there is overlapping between every two adjacent delay times in M delay time
Granularity is detected by the ECCA of preset quantity in timesharing, the part for configuring the non-overlap in addition to the part of overlapping of second type delay time
Composition, wherein preset quantity be greater than or equal to 1 and be less than each delay time in ECCA detection granularity sum (if
Each delay time be not ECCA detection granularity integral multiple, then for less than in each delay time ECCA detect granularity to
The number of upper rounding), i.e., every adjacent two at least one ECCA of delay times detection granularity is underlapped but at least there is weight
Folded part, and the part of the overlapping can be may not be with the integral multiple that ECCA detects granularity (if each delay time is
ECCA detects the integral multiple of granularity, then the part being overlapped is also the integral multiple of ECCA detection granularity；Otherwise, it is not), according to specific
Situation configuration, to realize looser Channel Detection.
In the above-mentioned technical solutions, it is preferable that each delay time in the M delay time is ECCA detection grain
The integral multiple for being greater than or equal to 2 of degree.
In the technical scheme, each delay time in M delay time includes at least the integer more than or equal to 2
The ECCA of the LBT mechanism based on LBE detect granularity, with whether detection channel idle for a long time again, and define delay
The relationship of time and ECCA detection granularity, and when each delay time is the whole more than or equal to 2 of ECCA detection granularity
When several times, the part of the overlapping of second type delay time and the part of non-overlap can detect granularity group by the ECCA of integer
At to realize the further definition to delay time.
In the above-mentioned technical solutions, it is preferable that when configuring the M delay according to the channel occupancy priority of sending object
Between component type, wherein configure the first type delay time for channel occupancy priority sending object rearward, with
And the second type delay time is configured for the forward sending object of the channel occupancy priority.
In the technical scheme, by being configured according to the channel occupancy priority (i.e. different sending objects) of sending object
The component type of M delay time, specifically, if the priority of sending object busy channel is rearward, configurable first type prolongs
The slow time, if the priority of sending object busy channel is forward, configuration is more easily detected the second type delay of channel idle
Time, for example, for downlink PDCCH (Physical Downlink Control Channel Physical Downlink Control Channel)/
EPDCCH (Enhanced Physical Downlink Control Channel enhances Physical Downlink Control Channel) sends UL
Grant (uplink authorization) or PUSCH (the shared letter of Physical Uplink Shared Channel physical uplink for sending uplink
Road) priority be higher than send downlink PDSCH (Physical Downlink Shared Channel Physical Downlink Shared Channel),
It is higher than transmission downlink PDSCH for sending downlink discovery reference signal priority, UL grant scheduling is sent by unlicensed spectrum
PUSCH priority be higher than and be authorized to the PUSCH that frequency spectrum sends UL grant scheduling, the PDSCH (or PUSCH) of delay sensitive is excellent
First grade is higher than the insensitive PDSCH (or PUSCH) of time delay, combines for above a variety of comparison others, compared with the latter, Qian Zhexi
Prestige, which is easier to rob, accounts for channel, so the former configures second type delay time, and the latter should then configure for the first type delay time, with
It realizes different channel occupancy probabilities, and improves the efficiency of Channel Detection, and then improve channel occupancy probabilities.
In the above-mentioned technical solutions, it is preferable that persistently detected when within any delay time in the M delay time
When to channel idle, then stop at after any delay time carry out it is described using delay time as the Channel Detection of granularity,
And continue Channel Detection by ECCA detection granularity.
In the technical scheme, if being continuously detected channel idle in any delay time in M delay time,
Can stop at after any delay time and carry out using delay time as the Channel Detection of granularity, and restore by ECCA detection granularity after
It is continuous to carry out Channel Detection, carry out what when Channel Detection stopped by granularity of delay time through the above technical solutions, having determined
Definition, while the foundation of the specific value of determining M is provided, to keep the definition of delay time more perfect.
In the above-mentioned technical solutions, it is preferable that further include: record the initial CCA Channel Detection Time or described
The current value of ECCA random number N at the end of current ECCA detection granularity；And described in working as in the M delay time
When being continuously detected channel idle in any delay time, control keeps the current value of the ECCA random number N constant.
In the technical scheme, it is specified that in delay time operation whether successively decreasing of random number N value is specifically led to
The current value of ECCA random number N at the end of overwriting initial CCA Channel Detection Time or current ECCA detection granularity,
And if when being continuously detected channel idle in any delay time within M delay time, controlling and keeping ECCA random
The current value of number N is constant, i.e., the operation that the current value of ECCA random number N is not successively decreased is carried out within delay time.
Fig. 6 shows the block diagram of the LBT Channel Detection system according to an embodiment of the invention based on load.
As shown in fig. 6, the LBT Channel Detection system 600 according to an embodiment of the invention based on load, comprising:
Configuration module 602, for when the initial CCA Channel Detection Time or ECCA in the LBT Channel Detection based on load
When detecting channel busy in the current ECCA detection granularity of Channel Detection Time, in the initial CCA Channel Detection Time
Or M delay time is configured after the current ECCA detection granularity；Control module 604, within the M delay time
Continue the LBT Channel Detection based on load by granularity of delay time, wherein M is the integer more than or equal to 1.
In the technical scheme, when carrying out the LBT mechanism based on LBE, by the LBT Channel Detection based on load
When detecting channel busy in the current ECCA of initial CCA Channel Detection Time or ECCA Channel Detection Time detection granularity,
It, then can be when detecting channel busy in a certain granularity of first time CCA (initial CCA) detection or ECCA detection
M delay time is configured after the initial CCA Channel Detection Time or current ECCA detection granularity, for continuing to prolong
The slow time is that granularity carries out the LBT Channel Detection based on load, wherein M is the integer more than or equal to 1, and the specific value of M
Depending on as the case may be, to realize the accurate definition to delay time (defer period).
In the above-mentioned technical solutions, it is preferable that the configuration module 602 is specifically used for: the M delay time sequentially phase
There is no the parts of overlapping between adjacent and every two adjacent delay times, to form for the first type delay time；Or the M
There is the part of overlapping between every two adjacent delay times in delay time, to form second type delay time.
In the technical scheme, the definition to delay time type is realized, specifically, if M delay time sequentially phase
There is no the part of overlapping (i.e. delay time is fixed) between adjacent and every two adjacent delay times, then prolong for the first type
The slow time, and when (i.e. delay time is for the part that there is overlapping between every two adjacent delay times in M delay time
Sliding), then it is second type delay time, in this way, the definition of delay time has been refined, to make the definition of delay time more
Clearly, it is illustrated, and can satisfy to delay time to diversified demand.
In the above-mentioned technical solutions, it is preferable that the configuration module 602 is specifically also used to: configuring the second type delay
The part of the non-overlap in addition to the part of the overlapping of time granularmetric composition is detected by the ECCA of preset quantity, wherein
The preset quantity is greater than or equal to 1 and less than the sum of the ECCA detection granularity in each delay time.
In the technical scheme, when the portion that there is overlapping between every two adjacent delay times in M delay time
Granularity is detected by the ECCA of preset quantity in timesharing, the part for configuring the non-overlap in addition to the part of overlapping of second type delay time
Composition, wherein preset quantity be greater than or equal to 1 and be less than each delay time in ECCA detection granularity sum (if
Each delay time be not ECCA detection granularity integral multiple, then for less than in each delay time ECCA detect granularity to
The number of upper rounding), i.e., every adjacent two at least one ECCA of delay times detection granularity is underlapped but at least there is weight
Folded part, and the part of the overlapping can be may not be with the integral multiple that ECCA detects granularity (if each delay time is
ECCA detects the integral multiple of granularity, then the part being overlapped is also the integral multiple of ECCA detection granularity；Otherwise, it is not), according to specific
Situation configuration, to realize looser Channel Detection.
In the above-mentioned technical solutions, it is preferable that the configuration module 602 is specifically also used to: configuring the M delay time
In each delay time be ECCA detection granularity be greater than or equal to 2 integral multiple.
In the technical scheme, each delay time in M delay time includes at least the integer more than or equal to 2
The ECCA of the LBT mechanism based on LBE detect granularity, with whether detection channel idle for a long time again, and define delay
The relationship of time and ECCA detection granularity, and when each delay time is the whole more than or equal to 2 of ECCA detection granularity
When several times, the part of the overlapping of second type delay time and the part of non-overlap can detect granularity group by the ECCA of integer
At to realize the further definition to delay time.
In the above-mentioned technical solutions, it is preferable that the configuration module 602 is specifically also used to: according to the channel of sending object
Occupy the component type that priority configures the M delay time, wherein be the transmission pair of the channel occupancy priority rearward
The second type is configured as configuring the first type delay time, and for the forward sending object of the channel occupancy priority
Delay time.
In the technical scheme, by being configured according to the channel occupancy priority (i.e. different sending objects) of sending object
The component type of M delay time, specifically, if the priority of sending object busy channel is rearward, configurable first type prolongs
The slow time, if the priority of sending object busy channel is forward, configuration is more easily detected the second type delay of channel idle
Time, for example, for downlink PDCCH (Physical Downlink Control Channel Physical Downlink Control Channel)/
EPDCCH (Enhanced Physical Downlink Control Channel enhances Physical Downlink Control Channel) sends UL
Grant (uplink authorization) or PUSCH (the shared letter of Physical Uplink Shared Channel physical uplink for sending uplink
Road) priority be higher than send downlink PDSCH (Physical Downlink Shared Channel Physical Downlink Shared Channel),
It is higher than transmission downlink PDSCH for sending downlink discovery reference signal priority, UL grant scheduling is sent by unlicensed spectrum
PUSCH priority be higher than and be authorized to the PUSCH that frequency spectrum sends UL grant scheduling, the PDSCH (or PUSCH) of delay sensitive is excellent
First grade is higher than the insensitive PDSCH (or PUSCH) of time delay, combines for above a variety of comparison others, compared with the latter, Qian Zhexi
Prestige, which is easier to rob, accounts for channel, so the former configures second type delay time, and the latter should then configure for the first type delay time, with
It realizes different channel occupancy probabilities, and improves the efficiency of Channel Detection, and then improve channel occupancy probabilities.
In the above-mentioned technical solutions, it is preferable that the control module 604 is specifically used for: when in the M delay time
Any delay time in when being continuously detected channel idle, then stop at after any delay time carry out it is described to prolong
The slow time is the Channel Detection of granularity, and continues Channel Detection by ECCA detection granularity.
In the technical scheme, if being continuously detected channel idle in any delay time in M delay time,
Can stop at after any delay time and carry out using delay time as the Channel Detection of granularity, and restore by ECCA detection granularity after
It is continuous to carry out Channel Detection, carry out what when Channel Detection stopped by granularity of delay time through the above technical solutions, having determined
Definition, while the foundation of the specific value of determining M is given, to keep the definition of delay time more perfect.
In the above-mentioned technical solutions, it is preferable that further include: logging modle 606, for recording the initial CCA letter
The current value of ECCA random number N at the end of road detection time or the current ECCA detection granularity；And the control mould
Block is also used to: when being continuously detected channel idle in any delay time in the M delay time, control is protected
The current value for holding the ECCA random number N is constant.
In the technical scheme, it is specified that in delay time operation whether successively decreasing of random number N value is specifically led to
The current value of ECCA random number N at the end of overwriting initial CCA Channel Detection Time or current ECCA detection granularity,
And if when being continuously detected channel idle in any delay time within M delay time, controlling and keeping ECCA random
The current value of number N is constant, i.e., the operation that the current value of ECCA random number N is not successively decreased is carried out within delay time.
Fig. 7 shows the block diagram of base station according to an embodiment of the invention.
As shown in fig. 7, base station 700 according to an embodiment of the invention, comprising: such as any one of above-mentioned second aspect
The LBT Channel Detection system 600 based on load, therefore, the base station 700 have and any one of second aspect described in
The identical technical effect of LBT Channel Detection system 600 based on load, details are not described herein.
Fig. 8 shows the block diagram of terminal according to an embodiment of the invention.
As shown in figure 8, terminal 800 according to an embodiment of the invention, comprising: such as any one of above-mentioned second aspect
The LBT Channel Detection system 600 based on load, therefore, the terminal 800 have and any one of second aspect described in
The identical technical effect of LBT Channel Detection system 600 based on load, details are not described herein.
Illustrate technical solution of the present invention below with reference to Fig. 9, Figure 10, Figure 11 and Figure 12.
Fig. 9 shows the schematic diagram of the first type defer period according to an embodiment of the invention.
Figure 10 shows the schematic diagram of second type defer period according to an embodiment of the invention.
Figure 11 shows the random number N value according to an embodiment of the invention in the first type defer period and does not pass
The schematic diagram subtracted.
Figure 12 shows the random number N value according to an embodiment of the invention in second type defer period and does not pass
The schematic diagram subtracted.
The first is fixed defer period (delay time, i.e. the first type delay time) position, as shown in figure 9,
Here a defer period is indicated with 4 ECCA slot (ECCA detects granularity) in schematic diagram, is configured with 3 (i.e. M altogether
It is taken as 3) a defer period.As can be seen that each defer period includes is nonoverlapping ECCA slot.If
First delay time is not detected the channel duration free time, then continues to test in second delay time.If detected
Channel idle then without second and subsequent delay time, but restores the detection granularity of ECCA slot, unless existing again
Channel busy is detected in ECCA slot.However, those skilled in the art should know be only each defer with M=3 here
Period is illustrated for being indicated with 4 ECCA slot, and the specific value of M and each defer period are included
ECCA slot number as the case may be depending on, it is preferable that the value of M in which defer period continue
Detect that channel idle is configured for foundation.
Second is defer period (delay time, the i.e. second type delay time) position slided, as shown in Figure 10,
Here a defer period is indicated with 4 ECCA slot (ECCA detects granularity) in schematic diagram, is configured with 3 (i.e. M altogether
It is taken as 3) a defer period.As can be seen that adjacent delay time includes 3 (portions of overlapping ECCA slot of overlapping
Point), that is to say, that it is (non-heavy that the latter defer period than previous defer period has slided backward 1 ECCA slot
Folded part) length.For the ECCA slot that the first does not include overlapping, LBT mechanism is looser for this, it is easier to
Detect channel idle.However, those skilled in the art should know be only with M=3 here, each defer period is with 4
It is illustrated for a ECCA slot expression, and the ECCA that the specific value of M and each defer period are included
The number of slot as the case may be depending on, it is preferable that the value of M is to be continuously detected letter in which defer period
The road free time is that foundation is configured.
When defer period fixes (i.e. the first type delay time), within defer period, N value is not successively decreased,
As shown in figure 11, when ECCA starts, channel idle is detected in two ECCA slot in front, then N becomes N-2, in third
Channel busy is detected in ECCA slot, then opens defer period and (carry out using delay time being granularity based on load
LBT Channel Detection).In first and second defer period, it is not continuously detected channel idle, and third is a
During defer period, it is continuously detected channel idle, then at the end of third defer period or N-2,
In subsequent ECCA slot, if detecting channel idle, it is decremented to N-3, N-4 ....
And when defer period slides (i.e. second type delay time), within defer period, N value is not passed
Subtract, as shown in figure 12, when ECCA starts, detects channel idle in two ECCA slot in front, then N becomes N-2, in third
Channel busy is detected in a ECCA slot, then opens defer period and (carry out using delay time being granularity based on load
LBT Channel Detection).In first and second defer period, it is not continuously detected channel idle, and third is a
During defer period, it is continuously detected channel idle, then at the end of third defer period or N-2,
In subsequent ECCA slot, if detecting channel idle, it is decremented to N-3, N-4 ....
The technical scheme of the present invention has been explained in detail above with reference to the attached drawings, may be implemented to delay time (defer
Period accurate definition) realizes different channels so as to configure different delay times for different sending objects
Acquistion probability, to improve the efficiency of Channel Detection.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (15)
1. a kind of LBT channel detection method based on load characterized by comprising
When the initial CCA Channel Detection Time or ECCA Channel Detection Time in the LBT Channel Detection based on load
Current ECCA detection granularity in when detecting channel busy, in the initial CCA Channel Detection Time or described current
ECCA configures M delay time after detecting granularity；
Continue the LBT Channel Detection based on load by granularity of delay time within the M delay time,
In, M is the integer more than or equal to 1；
There is no the parts of overlapping between the M delay time sequentially adjacent and every two adjacent delay times, to form
First type delay time；Or
There is the part of overlapping between every two adjacent delay times in the M delay time, is prolonged with forming second type
The slow time.
2. the LBT channel detection method according to claim 1 based on load, which is characterized in that
The part of the non-overlap in addition to the part of the overlapping of the second type delay time by preset quantity the ECCA
Detect granularmetric composition, wherein the ECCA detection that the preset quantity is greater than or equal to 1 and is less than in each delay time
The sum of granularity.
3. the LBT channel detection method according to claim 2 based on load, which is characterized in that
Each delay time in the M delay time is the integral multiple for being greater than or equal to 2 of ECCA detection granularity.
4. the LBT channel detection method according to claim 1 based on load, which is characterized in that
The component type of the M delay time is configured according to the channel occupancy priority of sending object, wherein be the channel
It occupies the sending object of priority rearward and configures the first type delay time, and is forward for the channel occupancy priority
Sending object configures the second type delay time.
5. the LBT channel detection method according to any one of claim 1 to 4 based on load, which is characterized in that
When being continuously detected channel idle within any delay time in the M delay time, then described appoint is stopped at
Using delay time as the Channel Detection of granularity described in being carried out after one delay time, and continue by ECCA detection granularity
Channel Detection.
6. the LBT channel detection method according to claim 5 based on load, which is characterized in that further include:
Record the ECCA random number N at the end of the initial CCA Channel Detection Time or current ECCA detection granularity
Current value；And
When being continuously detected channel idle in any delay time in the M delay time, control keeps institute
The current value for stating ECCA random number N is constant.
7. a kind of LBT Channel Detection system based on load characterized by comprising
Configuration module, for when the initial CCA Channel Detection Time or ECCA in the LBT Channel Detection based on load
When detecting channel busy in the current ECCA detection granularity of Channel Detection Time, in the initial CCA Channel Detection Time
Or M delay time is configured after the current ECCA detection granularity；
Control module, for continuing the LBT based on load by granularity of delay time within the M delay time
Channel Detection, wherein M is the integer more than or equal to 1.
8. the LBT Channel Detection system according to claim 7 based on load, which is characterized in that the configuration module tool
Body is used for:
There is no the parts of overlapping between the M delay time sequentially adjacent and every two adjacent delay times, to form
First type delay time；Or
There is the part of overlapping between every two adjacent delay times in the M delay time, is prolonged with forming second type
The slow time.
9. the LBT Channel Detection system according to claim 8 based on load, which is characterized in that the configuration module tool
Body is also used to:
The part of the non-overlap in addition to the part of the overlapping of the second type delay time is configured as described in preset quantity
ECCA detects granularmetric composition, wherein the ECCA that the preset quantity is greater than or equal to 1 and is less than in each delay time
Detect the sum of granularity.
10. the LBT Channel Detection system according to claim 9 based on load, which is characterized in that the configuration module tool
Body is also used to:
Configure the integral multiple for being greater than or equal to 2 that each delay time in the M delay time is ECCA detection granularity.
11. the LBT Channel Detection system according to claim 8 based on load, which is characterized in that the configuration module tool
Body is also used to:
The component type of the M delay time is configured according to the channel occupancy priority of sending object, wherein be the channel
It occupies the sending object of priority rearward and configures the first type delay time, and is forward for the channel occupancy priority
Sending object configures the second type delay time.
12. the LBT Channel Detection system according to any one of claim 8 to 11 based on load, which is characterized in that institute
Control module is stated to be specifically used for:
When being continuously detected channel idle within any delay time in the M delay time, then described appoint is stopped at
Using delay time as the Channel Detection of granularity described in being carried out after one delay time, and continue by ECCA detection granularity
Channel Detection.
13. the LBT Channel Detection system according to claim 12 based on load, which is characterized in that further include:
Logging modle, at the end of recording the initial CCA Channel Detection Time or the current ECCA detection granularity
ECCA random number N current value；And
The control module is also used to: when being continuously detected letter in any delay time in the M delay time
When the road free time, control keeps the current value of the ECCA random number N constant.
14. a kind of base station characterized by comprising the LBT letter based on load as described in any one of claim 8 to 13
Road detection system.
15. a kind of terminal characterized by comprising the LBT letter based on load as described in any one of claim 8 to 13
Road detection system.
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| CN201510466628.5A CN105634859B (en) | 2015-07-31 | 2015-07-31 | LBT channel detection method and system, base station and terminal based on load |
| PCT/CN2015/088489 WO2017020384A1 (en) | 2015-07-31 | 2015-08-30 | Load-based lbt channel detection method and system, base station, and terminal |
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| CN201510466628.5A CN105634859B (en) | 2015-07-31 | 2015-07-31 | LBT channel detection method and system, base station and terminal based on load |
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| CN106788936B (en) * | 2016-12-26 | 2020-04-07 | 北京小米移动软件有限公司 | Information feedback method, device, user equipment and base station |
| CN109803442B (en) * | 2017-11-17 | 2023-02-10 | 华为技术有限公司 | Method for sending synchronization signal, network equipment and terminal equipment |
| WO2021217517A1 (en) * | 2020-04-29 | 2021-11-04 | 北京小米移动软件有限公司 | Channel detection method and apparatus, communication device, and storage medium |
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